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The perfect life of a strict and tough rhythmic gymnastics teacher of competition begins to escape out of her hands.

Two sisters discover disturbing family secrets after a string of mysterious deaths occur on a luxury ship traveling from Spain to Brazil in the 1940s.

Marcos (Roberto Álamo) is a firefighter who, in spite of being used to extreme situations, goes into shock when life deals him a bad hand. His new inability to empathize with others affects both his personal and professional life. He seeks the help of a psychologist, Luna (Manuela Vellés), who with his daughter Lola (Claudia Placer) helps him rebuild his life.

Two sisters turns in the center of a plot implying wolfram, Nazis, Franco's prisoners and British spies.